If you have a normally developing intrauterine pregnancy (and it sounds like you do) there is no utility to checking hCG levels. There is no evidence that progesterone supplementation is helpful in these circumstances to help prevent a miscarriage (although it is often used). Also, with high anti-cardiolipin ab levels there is no clear well proven therapeutic intervention. Some physicians will use low dose aspirin and/or heparin to decrease the chance of a poor outcome, but the data on this is also limited.
However, the larger issue is that you need to feel comfortable with the obstetrician managing your care and if that is not the case you should seek a second opinion or care elsewhere.